Technical description
2 Protection functions
2.7 Directional earth fault
protection I0φ> (67N)
VM59.EN001
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61
Parameter
Value
Unit
Description
Note
IoRes
pu
Resistive part of I
0
(only when
"InUse"=Res)
IoCap
pu
Capacitive part of I
0
(only
when "InUse"=Cap)
Io
>
A
Pick-up value scaled to
primary value
Io
>
pu
Pick-up setting relative to the
parameter “Input” and the
corresponding CT value
Set
Uo>
%
Pick-up setting for U
0
Set
Uo
%
Measured U
0
Curve
DT
IEC
IEEE
IEEE2
RI
PrgN
Delay curve family:
Definite time
Inverse time. See chapter
2.14.
Set
Type
DT
NI
VI
EI
LTI
Paramet
ers
Delay type.
Definite time
Inverse time. See chapter
2.14.
Set
t>
s
Definite operation time (for
definite time only)
Set
k>
Inverse delay multiplier (for
inverse time only)
Set
Mode
ResCap
Sector
Undir
High impedance earthed nets
Low impedance earthed nets
Undirectional mode
Set
Offset
Angle offset (MTA) for RecCap
and Sector modes
Set
Sector
Default
= 88
±°
Half sector size of the trip
area on both sides of the offset
angle
Set
ChCtrl
Res
Cap
DI1, DI2
VI1..4
Res/Cap control in mode
ResCap
Fixed to Resistive
characteristic
Fixed to Capacitive
characteristic
Controlled by digital input
Controlled by virtual input
Set